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Chiroptical Properties of the Guanidine Chromophore

Siemion I., Ślepokura K., Gawłowska M., Biernat M.

Polish Journal of Chemistry

2005

Vol. 79 / nr 2

401-412

The CD spectra of 15 alfa-guanidino-acids, derived from 15 proteinaceous amino acids were measured and analysed. Using L-amidino-proline, L-amidino-prolinol, and L-amidino- 4-hydroxyproline as standards the sector rule for prediction of the sign of the Cotton effect at 190-195 nm, attributed to the guanidine chromophore, was constructed. X-ray analysis of crystal structures of L-amidino-4-hydroxyproline and L-amidinomethionine was also performed.